Jack



Juli} s 1924,

' 1,500,604 J. GENDER JACK Filed AuZ. 2, 1923 Patented July 8, 1924 nairae stares isaatai PATENT oration;

JOHN GENDER, F FOOSLAND; ILLINOIS.

' JACK.

Application filed August" 2, 1923. Serial No. 6515,2761

T0 all'wh omiit may wager m: 7

Be it known that JOHN GENDER, a citizen ofi'the United States," residingat route'l, box 6; F boslandjin the' county of Chain paign andState of Illinois, has "invented certain new and useful Improvements in J acks; of which the following is'a specification.

This inventionrelates to a lifting jack 1 and has for" itsprinei al 'object toprovide a simple andefficient means for use in conne'c'tion with a corn s-hellerand acts 'asa prop for the 'mai-ndriv'e shaft to 'keep the belt from slipping thereby causing the corn sheller to: at all times be in'a proper operative position "when in use;

Another important obje'c't'of the invention is to provide a jack of the above himtio'ned character; which when in use upon a 'corn'sheller' will prevent jarring and will cause the corn she'ller to operate more easily and which will not 'interfere withthe 0peration'of the samel' p A further object of th invention is to provide a jack of the above mentioned character, which mayalso be used for any other suitable purpose and which will efficiently operate under all circumstances. I

Another important object" of the invention is to provide a jack of the above mentioned character which is simple in construction, inexpensive, strong and durable and'very well adapted for the purposesfor which it is designated.

Other objects and advantages of'thisinvention will become apparent during the course of the following description.

In the accompanying drawings forming a part, of the specification and-in which like numerals designate like parts throughout the same.

' Figure 1 is a vertical section of my invention.

Figure 2 is a section taken on line 2-2- of Figure 1 and Figure 3 is a section'taken on line 3 3 of Fig. 1Q

In the drawing's'flwherein for the purpose .of illustration is shown the preferred embodiment of my invention, the'numcra-l 1 designates the tubular stand which is provided at one end with the "base or end plate 2.- The opposite end of the tubularmemher]. is provided with a vertically extendingslot 3 which extends from the open end of the standard inwardly "for "a suitable dis tance" andthe purpose ofthis"slotwill be hereinafter more fully described.

The tubular standard 1 isfurthermor'e provided with a longitudina llyextending slot 4 provided in the intermediate portion thereof and the purpose of this slot will be hereinafter more fully described.

Slida'bly mounted in the 'sta ndardl is the elongated cylindrical 'member'fij The cylindrical member 5 is provided 'witha series of longitudinally extending teeth which form a rack balr7 and this "rackfbar is adapted to'b mounted on the cylindrical member 5 adjacent its uppenend. The rack bar 7 is'fu'rthermore adapted to co-operate with the vertically extending slot 3'pr'ovided-inthe upper end of the tubular standard 1 and the lower "end of the cylindrical member '5 is provided with'a pi'n' SWhich extends through the longitudinally extending-slot" 4 for the purpose ofpreVenting the rotary; movement of the cylindrical member 5 within the tubular standard 1 when the sameis in operation. Mounted on the upper end of the tubular'standard 1 is the bracket 9 and this bracket'9 coinprises a flat strip of metal encircling the tubular standard 1 and having its free end extending beyond th side of the standard and adapted to receive the transversely extending pin 10. Pivotally mounted on the transverse pin 10 and disposed between the free endsfo-f the arms of the bracket '9 is the pawl 11; The pawl 11 has its free end adapted to engage the ratchet teeth 6 provided on the rack bar 7 and for the purpose of normally holding the pawl in engagement with the'ratchet teeth on the rack bar, I provide the hat spring 12'. This flat spring 12 being secured at its lower end to the tubular standard and having its upper free end slidably associated with the intermediate portion of the pawl 11 in th manner as further shown in the drawings' Fulcrumed on the transversely extending pin 10 is the lever 13. This lever 13 has its inner end forming a substantially U- shaped member which encloses the free end of the outwardly extending arms of the bracket 9 and through. which is adapted to extend th transversely extending pin '10. Pivotally mounted in the U-shaped portion of the lever 13 and preferably on the end 14 is the pawl 15. This pawl 15 is of a purpose to be more fully described.

In order to insure the proper operation of the pawls 11 and,15v respectively, and

to keep the same in engagement with the ratchet teeth on the rack bar, I provide a guide member 16. This guide member 16 is mounted on the tubular standard 1 adjacent the outer free end thereof and extends outwardly therefrom and encloses the intermediate portion of said pawl in the manner as clearly shown in the drawings.

The pawl ll is adapted to act as a means for normally holding the upper free end of the cylindrical member 57in its adjusted position and when it is desired to raise the cylindrical member 5 to a higher height the lever 13 is actuated in such a manner as to cause the lifting of the cylindrical member, by the actuation of the pawl 15. When the lever 13 is swung downwardly the pawl 15 is pulled out'of engagement with the ratchet teeth on the rack bar 7, but the shorter pawl 11 will be'in engagement with the ratchet teeth and hold the cylindrical member 5 in the adjusted position. If it is desired to raise the cylindrical member 5, the lever 13 is swung upwardly and this causes the pawl. 15 to again engage the ratchet teeth on the rack bar above the pawl 11 and consequently result in the lifting of the cylindrical member 5 to its predetermined length or height. In this manner, it will be seen that there is no possibility ofthe cylindrical member becoming accidentally lowered for the reason that the pawl 11 which acts as a stationary member will hold the cylindrical memberin adjusted position. V.

When it is desired to release the. pawl 11 from engagement with the rack bar so that the cylindrical member 5 may be lowered, the

. pawls are disengaged from the ratchet teeth on the rack bar and the coil spring 17 which is connected at one end to the base 2 and at its opposite end to the lower end of the cylindrical member 5, will cause the retraction of the cylindrical member 2 into the tubular standard 1 immediately upon release of "the ,pawls from engagement with the rack bar mounted on theupper end of the cylindrical member.

The purpose of providing the slots in the tubular standard 1 is to prevent the rotation of the cylindrical member 5 when the same being actuated by the pawls 11 and 15 and will thereby insure the proper engagement of the pawls with the ratchet teeth on the rack bar.

i ,It will thus be seen from the foregoing description, that a jack has been provided wherein the cylindricalmember may be adjusted to various lengths and which will be held in such adjusted position against the possibility of accidental lowering of' the same and furthermore is positive in its action; The simplicity of my device furthermore enables the same to be readily and easily operated and does not require the necessity of having to provide auxiliary holdthe objects of the invention, and while I v have particularly described the elements best adapted to perform the functions set forth, it is obvious that various changes in form, proportion and in the minor details of construction may be resorted to, without departing from the spirit or sacrificing any of the principlesof the invention. V i

1. A jack of the class described comprising a tubular standard having a vertically extending slot at its upper end, an elongated cylindrical member' 'slidably mounted in said tubular standard, arack bar on the upper end of said cylindrical member and adapted to be in slidable engagement with said slot, a bracket extending from said standard, a transverse'pin carried by the outer ends of said bracket, apawl pivotedon said pin between the outer ends of said bracket, and adapted to engagesaid rackbar, means for normally holding said pawl's in engagement with said rack bar, a lever fulcrumed on said pin, a lifting pawlpivotally mounted at its lower end on said lever, and adapted to have its free end in engagement with said rack bar above the first mentioned pawl, and a guide carried by said standard and extending outwardly therefrom for receiving said pawls. f'

2. A jack of the class described comprising a tubularstandard providedwith a ver-' tically extending slot at its upper end, .and a longitudinally extending slot at. itsintermediate portion, a cylindrical memberslidably mounted therein, a rack bar on theupper llt) end of said cylindrical member and adapted to be in sliding engagement with the first mentioned slot, a pin associated" with the lower end of said cylindrical member'and extending throughsaid longitudinal slot for preventing the rotary movement of said cylindrical member in said tubular standard,

a bracket extending from said standard, a

transverse pin carried bythe outer: end of said bracket, a pawl pivoted on said pin, and

adapted to engage said'rack bar, means for lower end of said cylindrical member, returning said cylindrical member to its normal position when said pawls are released from 10 engagement with said rack bar.

In testimony whereof I affix my signature.

JOHN GENDER. 

